One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,7,9,16)(4,12,14,5)(10,11,13,15)(17,18,23,26)(19,22,21,24)(20,25,30,32)(27,29,28,31)(34,36)(35,38)(37,45)(47,48)(1,3)(2,7)(4,10)(5,15)(6,9)(8,16)(11,12)(13,14)(19,21)(22,24)(27,28)(29,31)(33,34,39,36)(35,40,38,43)(37,44,45,41)(42,48,46,47)(3,9)(7,16)(10,13)(11,15)(17,19,23,21)(18,24,26,22)(20,28,30,27)(25,29,32,31)(33,35,39,38)(34,40,36,43)(37,42,45,46)(41,47,44,48)(1,3)(2,7)(4,13)(5,11)(6,9)(8,16)(10,14)(12,15)(17,20)(18,25)(19,27)(21,28)(22,29)(23,30)(24,31)(26,32)(33,36,39,34)(35,40,38,43)(37,41,45,44)(42,48,46,47)(1,4)(2,5)(3,10)(6,14)(7,15)(8,12)(9,13)(11,16)(17,21,23,19)(18,22,26,24)(20,27,30,28)(25,31,32,29)(33,37,39,45)(34,41,36,44)(35,42,38,46)(40,47,43,48)(1,5)(2,4)(3,11)(6,12)(7,13)(8,14)(9,15)(10,16)(17,22)(18,19)(20,29)(21,26)(23,24)(25,27)(28,32)(30,31)(33,38,39,35)(34,40,36,43)(37,46,45,42)(41,47,44,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.